<?php
/**
 * Class Minify_Controller_Version1
 * @package Minify
 */

require_once 'Minify/Controller/Base.php';

/**
 * Controller class for emulating version 1 of minify.php
 *
 * <code>
 * Minify::serve('Version1');
 * </code>
 *
 * @package Minify
 * @author Stephen Clay <steve@mrclay.org>
 */
class Minify_Controller_Version1 extends Minify_Controller_Base {

	/**
	 * Set up groups of files as sources
	 *
	 * @param array $options controller and Minify options
	 * @return array Minify options
	 *
	 */
	public function setupSources($options) {
		self::_setupDefines();
		if (MINIFY_USE_CACHE) {
			$cacheDir = defined('MINIFY_CACHE_DIR')
			? MINIFY_CACHE_DIR
			: '';
			Minify::setCache($cacheDir);
		}
		$options['badRequestHeader'] = 'HTTP/1.0 404 Not Found';
		$options['contentTypeCharset'] = MINIFY_ENCODING;

		// The following restrictions are to limit the URLs that minify will
		// respond to. Ideally there should be only one way to reference a file.
		if (! isset($_GET['files'])
		// verify at least one file, files are single comma separated,
		// and are all same extension
		|| ! preg_match('/^[^,]+\\.(css|js)(,[^,]+\\.\\1)*$/', $_GET['files'], $m)
		// no "//" (makes URL rewriting easier)
		|| strpos($_GET['files'], '//') !== false
		// no "\"
		|| strpos($_GET['files'], '\\') !== false
		// no "./"
		|| preg_match('/(?:^|[^\\.])\\.\\//', $_GET['files'])
		) {
			return $options;
		}
		$extension = $m[1];

		$files = explode(',', $_GET['files']);
		if (count($files) > MINIFY_MAX_FILES) {
			return $options;
		}

		// strings for prepending to relative/absolute paths
		$prependRelPaths = dirname($_SERVER['SCRIPT_FILENAME'])
		. DIRECTORY_SEPARATOR;
		$prependAbsPaths = $_SERVER['DOCUMENT_ROOT'];

		$sources = array();
		$goodFiles = array();
		$hasBadSource = false;

		$allowDirs = isset($options['allowDirs'])
		? $options['allowDirs']
		: MINIFY_BASE_DIR;

		foreach ($files as $file) {
			// prepend appropriate string for abs/rel paths
			$file = ($file[0] === '/' ? $prependAbsPaths : $prependRelPaths) . $file;
			// make sure a real file!
			$file = realpath($file);
			// don't allow unsafe or duplicate files
			if (parent::_fileIsSafe($file, $allowDirs)
			&& !in_array($file, $goodFiles))
			{
				$goodFiles[] = $file;
				$srcOptions = array(
                    'filepath' => $file
				);
				$this->sources[] = new Minify_Source($srcOptions);
			} else {
				$hasBadSource = true;
				break;
			}
		}
		if ($hasBadSource) {
			$this->sources = array();
		}
		if (! MINIFY_REWRITE_CSS_URLS) {
			$options['rewriteCssUris'] = false;
		}
		return $options;
	}

	private static function _setupDefines()
	{
		$defaults = array(
            'MINIFY_BASE_DIR' => realpath($_SERVER['DOCUMENT_ROOT'])
		,'MINIFY_ENCODING' => 'utf-8'
		,'MINIFY_MAX_FILES' => 16
		,'MINIFY_REWRITE_CSS_URLS' => true
		,'MINIFY_USE_CACHE' => true
		);
		foreach ($defaults as $const => $val) {
			if (! defined($const)) {
				define($const, $val);
			}
		}
	}
}

